Fluid translation device.



. R. N. EHRHART. FLUID TRSLTION'DEVIGE.

APPLICATION FILED APILZI, 1905.

927,515. l Patented July 13, 1909.

2 SHEETS-SHEET 1.

R N EHRHART FLUID TRANSLATN Dnvw.

APPLICATION FILED PLI, 1905. V 92?',5159 Patented July 13, 1909.

2 SHEETS-SHEET 2.

y @b @man (M/vanto@ Q2 www, wv MWM S. 4M,

UNITED sTaTEs PATENT oEEIoE.

RAYMOND N. EHRHART, OF PITTSBUltG, PENNSYLVANIA, SSIGNOR TO THE WESTINGHOUSE MACHINE COMPANY, A CORPORATION OF PENNSYLVANIA.

FLUID TRANSLATION DEVICE.

To all whom it may concern:

Be it known that l, RAYMOND N. EHR- HART, a citizen oi' the United States, and a resident of Pittsburg, in the county ol' Allegheny and State of Pennsylvania, have invented a new andV useful lmprovement in..

Fluid Translation Devices, of which the iol lowing is a specification.

This invention relates to fluid translation devices and more particularly to the blades and venes of such devices.

The improvements comprised in this invention are applicable to various types of iluid pressure turbines, compressors or blowers and lin fact, are not limited to any partie ular form ofsuch machines.

Itis the object ol' this invention to produce a blade or vane construction whereby the blades or venes, which 'may be formed in any desired manner, may be assembled compactly, cheaply and quickly..

A further object is to produce a blade con` struction and a method ol mounting the same, adapted to overcome the tendencies of the blades to be radially dislodged when subu jected to centrifugal force.

A still further object is to produce a blade `and vane construction, and a method oi' securing the same to themounting member, such that the blades or vanes may be readily removed, if desired, without being distorted. or injured.

These and otherobjects I attain in blades or vanes embodying the features herein described, illustrated and set forth.

In the drawings accompanying this appli cation and forming apart thereof, Figurel is a fragmentary elevation ol a compressor showing a portion of the blades mounted to the rotor and a ortion of the vanos mounted to the stator. ig.` 2 is a partial longitudinal section through the shaft of a compressor, showing the arrangement oi' the blades and vanes and the method ol' mounting the same to the rotor and the stator, respectively. Fig. 3 shows a partial isometric projection of the dillerent elements forming the blade mounting piece oi the rotor. Figs. 4, 5 and 6 show isometric projections of different forms of blades or vanes. Fig. 7 is an isometricprojection of a s acing piece shown in connection with the en portion of two blades or vanes in Fig. 8. Fi 8 is a perspective view ol' the ends oi two b ados illustratingthe method of spacing the blades or vanes.l

specification of Letters Patent.

Application led April 21, 1905. Serial No. 256,749.

Patented .my 13, 190e.

The blades or vanos may be stamped, pressed, drawn or extruded and are provided with a mounting end, which is cut and crimped, as shown in the Figs. 4, 5, and 6. The mounting end is provided with a suitablylocated hole 11. The blades and vanos may be also shaped during the operation of the pressing or stamping, the working' portion being given any desired contour and the mounting portion formed with the ridges or grooves 12.

The rotor and stator, as shown in Fig. 2, are each arranged to accommodate two rows o'll blades or venes, (any number of rows however may be utilized), and the operation of mounting the vanes to the stator is substantially the same as mounting the blades to the rotor.

The rotor 13 is provided with an enlarged portion 14, with suitably tapped holes 15 and 16 at either side for mounting the blades and attaching the anchoring or holding rings 18 and 19. The holding ring 19 is provided with suitably arranged .holes 20, conforming in location and size with the holes 15 of the rotor portion. Mounting screws 21 are nsorted through the holes 20 and screwed into the tapped holes 15 in. the operation of mounting one row ol blades and the holding ring 19. Annularridges 22, of the holding ring 19, interleave with annular grooves 23 of the rotor portion 14.

The holding ring 18 is provided with the holes 20 and annular grooves 24, with which suitably arranged annular ridges 25, ol' the portion 14, interleave.

In mounting the blades to the rotor, the grooves or ridges 12, with which'the base ortions are provided, are made to intereave with the grooves or ridges 23.01 25 and the holes 11 are made to coincide with the holes 15 or 16 as the casemay be, of the enlarged portion 14 of the rotor.' After the blades are in ilace, the holding rings 18 and 19 are secured to the rotor by the screws 21 and since they are equipped with the grooves 24V and ridges 22 respectively, each of the blades composingthe two rows will be rlgidly held in* lace.

As a furter means of insuring a r1g1d mounting oi' the blades, the end ortion 1() is bent against the internal face of t e mountare connected by the screws 30. Thevanes,

. mined positions.

. vided.

like the blades, are equipped with ridges or grooves 12, which inter eave with suitably arranged grooves and ridges on the individual mounting pieces.

The portion 25 is deemed unnecessary in the vanes as they are not subjected to the dislodging forces that the blades encounter.

A lug 31 is shown in Figs. 4, 5, and 6 at- -tac'hed near the outer end of the blade l;A after the blades are mounted the portion 31, of one blade, iits into a slightly depressed. portion with which the adjacent blade is pro- 'Under these conditions the ends of the separate blades are rigidly held in place and prevented'from any relative motion. 3

A modified forni of the spacing piece is shown in Fig. 7. The piece consists of a spool portion 32 provided with end lugs 33,

which are adapted to iit into holes 34 near the outer portion of the blades or varies as shown in Fig. 8. After the blades or vanes are mounted to the rotor or stator, the working portions are turned to occupy predeter- The grooves or ridges 12 inthe mounting portion of the blades o'r vanes may be formed by the pressure of the holding or anchoring rings against their mounting portions.

It is obvious that the blades or vanes may be readily removed from their respective holding members without being distorted or injure and that no op ortunity is given for the blades to be radia ly dislodged when subjected to centrifugal force.

Although I have described but one embodiment of my invention, other forms and 4details of construction may readily suggest themselves to one skilled in the art and still fall within the spirit and scope of my invention and I further desire it to be understood that I `do not limit the application of my in` serrated holding pieces adapted to secure the blades or vanes to said rotor or stator. 2.' In combination with a blade or vane holding element, an annular row of blades, a spacing piece between adjacent blades and means formed integrally with the said piece and extending into said blades for securing said piece in place.

3. In combination with. a blade or vane holding element, an annular row of perforated l 1y With said piece and cooperating with the bladeperfQrations for-securing said piece in place.

ades, a spacing piece between anija-- cent blades and means formed integra j 4. In combination with a blade or vane holding element, composed of serrated mounting pieces and oppositely serrated holding rings, a blade or vane composed of a working portion and a serrated mounting portion and means dependent on the serrations and said holding ring for mounting the said blade or vane to the said mounting element.

5. In combination witha blade holding element, composed of a mounting piece and oppositely formed holding pieces adapted to be secured to said mounting piece by screws or bolts, a blade composed of. a working portion anda mounting portion provided with a mounting hole, and means dependent on the holding ring for securing the said blade to the said mounting piece, such that said bolt or screw is inserted through said mounting hole.

(if In combination with a blade holding element, composed of a serrated mounting piece and oppositely formed serrated holding pieces adapted to be secured to said mounting piece by screws or bolts, a blade or vane composed of a Working portion and a serrated mounting portion provided with a mounting hole, and means dependent on the holding ring for securing the said blade or vane to the said mounting piece, such that said boltv or screw is inserted throughsaid pieces, a blade or vane provided with a laterally extending or bent-over portion and means for securing the said blade or vane to `said mounting element such that the said laterally extending portion shall it against the face of said mounting element.

8. In combination with a blade or vane holding element, comprising a serrated mounting piece and an oppositely serrated holding piece, a blade or vane composed of a working portion and a serrated mounting portion, and means for securing said ring to said mounting piece and'for mounting said blade or vane on said rotor or stator.

9. In combination with a blade or vane holding element, an annular row of blades or vanes provided with substantially alined holes near their outer or free ends, a spacing piece between individual blades or vanes, provided at either end with lugs which extend into said holder.

10. In coin'bination with a blade Aor vane holding element, an annular row oi' blades or vanes provided with substantially alined holes near their outer or free ends, and a spacing piece, a portion of which lies between adjacent blades and portions of which extend into thcholesV in said' blades.

11. In combination Witha blade or vane holding element, an annular row of blades, a spacing fpiece between adjacent blades, and means, ormed integrally therewith, for se# curing said piece in place.

12. In combination with a blade or Vane holding element, an annular row of blades or V'anes, and a s acing member for the outer or free ends of t e said blades or vanes, a portion of which lies between adjacent blades or'vanes and a portion of which is secured to said blades to hold said element in place.

13. In combination with a blade or vane holding element, an annular row of perforated lades, spacing pieces between adjacent blades and means cooperating with said perforations for holding said pieces in place.

' 14. In combination with a blade orwane holding element, an annular row of blades havL holes extending therethrough near one end t ereof, separate spacing pieces lying between adjacent blades and means coperating with the holes in said blades for securing said pieces in place.

l5. In combination with a blade or Vane holding element, an annular row of perforated blades or vanes, separate j spacing members located between adjacent blades or vaines and means located centrall of said spacing members and extending into the perforations ol' said blades or Yanes for locking said spacing members to said blades or vanes.

16. In combination with a blade or vane holding element, an annular row of blades or vanes secured to said element and separate sjliacing members located between adjacent b ades or Vanes adjacent to their outer or free y ends.

.17. In combination with a turbine blade or vane holding element, an annular row of blades or vanes, individuals acing members located between adjacent to said blades or Vanes. y.

In testimony whereof, I have hereunto subscribed my name this eighteenth day of IAapril, 1905.

RAYMOND N. EHRHART.

Witnesses DAVID WILLIAMs, JNO. S. GREEN.

lades or vanes and means for locking sald spacing members 

